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Some of these posts are very old and might contain outdated information. You may wish to search for newer posts instead.
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Arp
roving mycophagist



Registered: 04/20/98
Posts: 2,191
Loc: in a van by the river
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Re: Quest for a fully automatized climate [Re: Erik006]
#8030568 - 02/16/08 09:30 AM (15 years, 11 months ago) |
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phew thanks for the info. won't be trying then
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poke smot!
floccinocci floofinator



Registered: 01/08/03
Posts: 5,248
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Re: Quest for a fully automatized climate *DELETED* [Re: Erik006]
#8030934 - 02/16/08 11:39 AM (15 years, 11 months ago) |
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Post deleted by poke smot!Reason for deletion: x
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cosmoline
expertcontaminationgrower



Registered: 08/11/07
Posts: 200
Last seen: 5 years, 27 days
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Re: Quest for a fully automatized climate [Re: poke smot!]
#8035618 - 02/17/08 09:39 PM (15 years, 11 months ago) |
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For a cheap, accurate temperature/RH sensor sensirion's SHT11 looks like the way to go. I finally got my sample months after I submitted it. The only problem with this sensor is that is has SMD connections which you really need to have a circuit board to mount it on. I'm going to make a HCL/h202 bath and print some simple ones out. If any of you are also working with this same sensor PM me with interest and I will print out a big batch.
-------------------- Buy the ticket, take the ride.
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poke smot!
floccinocci floofinator



Registered: 01/08/03
Posts: 5,248
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Re: Quest for a fully automatized climate *DELETED* [Re: cosmoline]
#8036891 - 02/18/08 07:42 AM (15 years, 11 months ago) |
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Post deleted by poke smot!Reason for deletion: x
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joesmithjoe
Stranger
Registered: 01/27/05
Posts: 62
Last seen: 13 years, 11 months
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Re: Quest for a fully automatized climate [Re: poke smot!]
#8052081 - 02/21/08 02:12 PM (15 years, 11 months ago) |
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I am really interested in this. I am planing on trying my had at designing a tec. that makes it almost as easy to grow pan as it is to grow cubs. The hardest part is getting the humidity right during fruiting imo so a project like this would cure that problem.
-------------------- Be Part of The New Pan Movement!!! http://www.shroomery.org/forums/showflat.php/Cat/0/Number/7559934/page/0/fpart/1/vc/1 cubies are for kiddies, grow pans!
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cosmoline
expertcontaminationgrower



Registered: 08/11/07
Posts: 200
Last seen: 5 years, 27 days
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Re: Quest for a fully automatized climate [Re: poke smot!]
#8052232 - 02/21/08 02:56 PM (15 years, 11 months ago) |
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Quote:
poke smot! said: cosmoline, there are SHT71's which have leads and do not require any smt stuff.
they have leads but are only accurate to 80% rH.
-------------------- Buy the ticket, take the ride.
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poke smot!
floccinocci floofinator



Registered: 01/08/03
Posts: 5,248
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Re: Quest for a fully automatized climate *DELETED* [Re: cosmoline]
#8052617 - 02/21/08 04:32 PM (15 years, 11 months ago) |
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Post deleted by poke smot!Reason for deletion: x
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cosmoline
expertcontaminationgrower



Registered: 08/11/07
Posts: 200
Last seen: 5 years, 27 days
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Re: Quest for a fully automatized climate [Re: poke smot!]
#8055046 - 02/22/08 01:47 AM (15 years, 11 months ago) |
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Quote:
poke smot! said: That is what the data sheet says. They do read up to 99%. With the internal condensation heater it seems these are very close to readings that were obtained using a small digital hygrometer similar to the ones people are using in their terrariums already.
Those hydrometers don't use digital humidity sensors, its all analog. If you want real accuracy you gota go digital. I'm gona stick with the sht11 or even better sht10. I already have circuit board layouts and will have them printed this weekend. The best part of using these is that the sht10 is only like 10$ from china and is accurate to 100%. This project is coming along well for me, expect to see good things from me in the future.
-------------------- Buy the ticket, take the ride.
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LoWgRoW
Strange



Registered: 09/22/07
Posts: 296
Last seen: 6 years, 11 months
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Re: Quest for a fully automatized climate [Re: cosmoline]
#8055468 - 02/22/08 08:22 AM (15 years, 11 months ago) |
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again great work! I can't wait to see how it in action.
-------------------- Avoid negative people.
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ShibariSmurf
Stranger
Registered: 06/04/07
Posts: 1
Last seen: 15 years, 10 months
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Re: Quest for a fully automatized climate [Re: cosmoline]
#8201492 - 03/27/08 01:07 PM (15 years, 10 months ago) |
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I'm in the final stages of putting together the arduino SHT71 system. My test show that the 71 is accurate within 2% when RH is over 90% (ie. if RH=90% than it reads 88% or 92%) this is within what I'm looking for so it works just fine and is better than the data sheet indicates.
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poke smot!
floccinocci floofinator



Registered: 01/08/03
Posts: 5,248
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Re: Quest for a fully automatized climate *DELETED* [Re: ShibariSmurf]
#8202215 - 03/27/08 04:47 PM (15 years, 10 months ago) |
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Post deleted by poke smot!Reason for deletion: x
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theratatat
Hobbyist



Registered: 03/09/07
Posts: 209
Last seen: 11 years, 4 months
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Re: Quest for a fully automatized climate [Re: poke smot!]
#8271706 - 04/11/08 09:48 PM (15 years, 9 months ago) |
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I just thought I would add my two cents to this one, even though its late in the game.
I am actually using the SHT11 for controlling humidity with an ultrasonic transducer. I have attached a screenshot of the web interface I built for it.

As you can see I am able to keep my humidity fairly even with this sensor. I am really happy with this sensor, except for a I had one crap out on me really early and had to send for a new one.
I have indeed wrapped my sensor in tyvek and have had really good luck since then. It doesn't really hurt the response time much.
Cheers
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